Crushing mill



March 1, 1938.. I w BEAUDRY 2,109,856

CRUSHING MILL Filed March 30, 1935 3 Sheets-Sheet 1 William 1.52m?

A Home y March 1 1938. w; A. BEAUDRY CRUSHING MILL Filed March 30, 1935 3 Sheets-Sheet 2 March 1, 1933 VV. A. BEAUDRY CRUSHING MILL Filed March 30, 19 35 3 Sheets-sh 3- Patented Mar. 1, 1 938 UNITED STATES PATENT OFFICE cauziih mr. v i I William A. Beaudry, Wallace Idaho v Application March 30, 1935, Serial No. 13,896

' k 4 Claims. (o 83-41) My present invention relates to improvements in crushing mills of the rotary, horizontal axis type, having an axial feed, wherein the material is first elevated'and then permitted to fall freely in a perpendicular shower, or continuous stream, of considerable length or'width. from end to end, but of screen-like thickness,-into the path of a revolving hat, by means of which the material in the stream or scre'enis continuously batted, or violently tossed against the enclosing wall of the mill. Both the impact of the bat against the stream of material, and the impact of the batted material against the wall of the mill, are eflective in breaking up or crushing the material.

While the mill of my invention is adapted for crushing various materials, it is especially designed for use in breaking up or crushing partially prepared rock-ore or mineral rock to a to a mineral separator. 4

The invention consists in certain novel combinations and arrangements of parts for accomplishing the above results as will hereinafter be more fully set forth and claimed.- In the accompanying drawings I have illustrated one complete example of the physical embodiment of my invention wherein the'parts are combined and arranged according to one mode I'have thus far devised for the practical application of the prin ciples of my invention. It will be understood that changes and alterations are contemplated.

showinga drain hole for water therein.

The rotary drum, which is of cylindrical shape and designated as l is provided with an exterior gearing or gear ring 2 that is engaged by a suitable, con'iplementary drive gear, to slowly revolve the drum anti-clockwise in Figures 4 and clockwise in Figure l. The drum is of that type having usual tapered ends or heads 3 and 4, and. these ends have trunnions 5 and 6 attached thereto by the respective flanges 5' and 6'; The

reduced condition of 'fineness suitable for feed of one of the interior liner-plates of the drum,

durability of the mill, and the mouth of the disopen trunnion 6, which forms the intake or feed end 01' the'mill is journaled in the bearing block I, and the larger, bored, trunnion 6 forms the discharge end of the mill; the bearing blocks 1 and 8, the latter for the discharge trunnion, be- "5 ing supported on a suitable foundation 9.

The trunnion 5 at the intake end is preferably provided with aninterior wear ring 10, or bushing. of suitable hard, material to enhance the In charge trunnion & which is larger in diameter than the axially alined opening in the trunnion 5, has a rounded face I I over'which the wet pulp may flow to the conveyer trough indicated at T in Figure 3. 4

During a wet process of crushing, the wet pulp is fed to the mill tothe depth of the water line- W. L. which is slightly below the intake end and slightly abovethe outlet or discharge end of the drum, and the wet pulp is continuously fed, and 20 the crushed material is discharged, to maintain this level.

The interior of the drum is lined for ready repairs and replacements. and in some instances a sound cushioning or insulating material may be interposed between the liningand the wall of the drum, for the purpose of reducing the noise when the mill is inoperation.

The cylindrical body of the drum is lined with specially formed plates 12, curved on their outer faces to conform to the inner periphery of the drum, and on theininner faces these plates are each fashioned with a longitudinally extending rib, l3, spaced from the plate,-forming a carrier, or elevator bucket l4, extending from, end to end of the .drum, and in some instances drain holes l5, for water, maybe provided .between the ribs and their respective plates, as indicated in Fig- 'ure5.'

These conveyer-troughs or elevator buckets; traveling to the right through the wet pulp in Figure 4, pick up quantities of solids with. the pulp, and just before reaching the zenith point or greatest height of the interior of the drum, the buckets dump their contents. '1 .e solids flow from the buckets insuccessive, thin streams, the length of the ribs'lfl; and the stream falls in a perpendicular plane at one side of the longitudinal axis of the drum.

In the falling path of the stream of solids a rotary bat l6, having batting vanes t1, and a longitudinal bore I8 is located. The bat as shown is in the form of a solid body, with integral vanes. and of course the faces of the vanes, andthe faces of the spaces between the vanes, form 5:;

barriers that prevent passage of the material through the bat. The spaces between the vanes form receptacles in which the material isdeposited in successive charges, and these charges of material are successively batted or tossed violently by the vanes against the side wall of the drum. The bat isrigidly mounted on a shaft l8, which, as shown is laterally offset from the longitudinal axis of the drum, and also elevated slightly above the axis of the drum, and the ends of the shaft protrude through the upper portions of the hollow trunnions 5 and 6 of the drum. The ends of the shaft are journaled in bearings 2|, exterior of the trunnion bearings. and the bat and shaft rotate in the same direction, but at a higher speed than the drum; a drive pulley P on the shaft being used for this purpose. The rotation of the drum and that of the bat are synchronized so that the successive streams dropping from the buckets will each be batted" by a vane H as the bat rotates. The impact of the falling solids on the bat may break up some of the solids, but the main crushing action, or reduction of the solids takes place when the successive vanes violently toss the solids laterally, across the interior of the drum against the opposite wall of the drum. This impact of the batted solids against the wall reduces the size of the solids to the desired fineness.

The face of the descending portion of the wall of the rotary drum, or the lining plates i2l3, thus form anvils against which the material is violently tossed, or hurled, or batted. by the rotary bat. The rotary bat is offset toward the conveyer-side or ascending side of the drum to be in the path of the falling stream of material, which, it will be noted, falls from the successive buckets or recesses ll just before they reach the zenith point of the drum. This eccentric location of the bat also provides the required distance between the bat and the anvils to insure the necessary speed of the batted material so that it will be smashed and broken by its impact against the anvils.

To assist 4 in the delivery of the successive streams of solids to the bat I employ'a stationary, counterbalanced, and adjustable weir-plate,

or dropper 22, of arcuate shape, and located in close proximity to the lips of the troughs or buckets l3. In area, this weir-plate is approximately the quadrant of a circle and substantially the length of the buckets or troughs. The upper or delivery edge 22' of the plate is in position to drop the contents of a bucket in a. thin stream, as the bucket or trough dumps its contents at this delivery point, and the upper portion of the weir-plate prevents the contents of the bucket from being prematurely dumped from the elevator buckets.

The weir-plate, at its opposite ends, is provided with spokes 23, which are rigid with hubs 2i, and these hubs are loosely journaled on the shaft is in order that the weir-plate may remain in stationary position.

The weir-plate may be adjusted to vary the relation of the delivery edge 22' to the dumping point of the elevator buckets, in order to secure greatest efliclency in the proper formation of the streams to be batted. For this p se the hubs are fashioned with depending arms 25, which arms are joined by means of a receptacle 2 in which a weight 21, of suitable character, is placed. As indicated in the drawings Figure 4, the weight 26 counterbalances the weir-plate, so that the load is perpendicular to the axis of the shaft II. If the load 26 were lightened, the weir-plate would swing down to the right in Figure 4 until the weight and the plate were counterbalanced. This counterbalancing movement would retract the delivery edge 22' away from the zenith of the interior of the drum, and consequently move the falling stream of the solids to the right in said figure of the drawings. After the plate has been once adjusted to eifective position, and counterbalanced in that position, the plate remains stationary during the peration of the mill.

As the solids are crushed and reduced in size, and due to the agitation of the wet pulp, the fine particles are gradually flowed over the annular lip of the revolving mouth I I together with excess water. The heavier particles, or coarse material that may not be broken during the first batting performance, are again picked up, delivered to the batter, and crushed, and this performance is repeated until the material is reduced to suificient fineness that it may be fiowed with the water. through the discharge trunnion. The feed of the material is of course governed or controlled in accord with the discharge.

The discharged material, being of a substantially uniform size, is thus classified as it leaves the mill, and therefore does not require further treatment of this nature, in preparation for the mineral separator.

The number of vanes ll of the batter may be varied to suit different conditions, and if found desirable, and the batter and drum, although revolving in the same direction, move at a predetermined ratio of speeds to synchronize the vanes with the dumping buckets. The exposed faces of the walls of the drum, the faces of the vanes, and other interior parts of the mill, are preferably hardened in suitable manner, to enhance the durability of the parts, and thelongevity of the mill.

In some instances the mill may be operated according to a. dry process, wherein the use of water is omitted, and an exhaust fan is employed at the discharge end of the mill to remove the dust or finely' reduced material. In the dry process the crushing or reducing of the material is accomplished in the same manner as that of the wet process.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is:

1. The combination with a rotary drum having hollow intake and outlet trunnions and journal bearings for the trunnions, and conveyer buckets mounted on the inner face of the drum, of a solid rotary bat having longitudinally extending, exterior, vanes and alternating spaces forming receptacles and located within the drum and offset toward the conveyor-side thereof, a shaft for the bat having its ends protruding through the trunnions, journal bearings for. the shaft, and said shaft disposed in eccentric relation to the longitudinal axis of the drum.

2. The combination with a rotary druriji having hollow intake and outlet trunnions and journal bearings therefor, and conveyer buckets mounted on the inner face of said drum, of a solid rotary bat having longitudinally extending, exterior, vanes and alternating spaces forming receptacles, said bat'being located in the drum in position for the receptacles to receive material from the buckets, a shaft for the bat and journal bearings for I the shaft, a stationary weir-plate iournaled on the shaft and located above the lower portion of the bat adjacent the buckets, and a counterweight rigid with the weirplate and located below the bat.

3. The combination in a crushing mill of the horizontal axis type with a rotary cylindrical drum having a series of conveyer troughs on its inner surface, of an arcuate-shapedweir plate within the drum and having its delivery edge adjacent of the drumfor oo-action with said troughs to deliver the solids in a falling stream, and a rotary bat'having a closed periphery and located below the weir plate in the path of the falling streams.

said carriers and adapted to violently toss solids 10 therefrom against said anvils.

WILLIAM A. BEAUDRY. 

